Thermal management enables stable perovskite nanocrystal light-emitting diodes with novel hole transport material

Shen, X; Kwak, SL; Jeong, WH; Jang, JW; Yu, Z; Ahn, H; Park, HJ; Choi, H; Park, SH; Snaith, HJ; Hwang, D-H; Lee, BR

Journal article

Thermal management enables stable perovskite nanocrystal light-emitting diodes with novel hole transport material

Abstract:: The severely insufficient operational lifetime of perovskite light-emitting diodes (LEDs) is incompatible with the rapidly increasing external quantum efficiency, even as it approaches the theoretical limit, thereby significantly impeding the commercialization of perovskite LEDs. In addition, Joule heating induces ion migration and surface defects, degrades the photoluminescence quantum yield and other optoelectronic properties of perovskite films, and induces the crystallization of charge transport layers with low glass transition temperatures, resulting in LED degradation under continuous operation. Here, a novel thermally crosslinked hole transport material, poly(FCA60 -co-BFCA20 -co-VFCA20 ) (poly-FBV), with temperature-dependent hole mobility is designed, which is advantageous for balancing the charge injection of the LEDs and limiting the generation of Joule heating. The optimised CsPbI3 perovskite nanocrystal LEDs with poly-FBV realise approximately a 2-fold external quantum efficiency increase over the LED with commercial hole transport layer poly(4-butyl-phenyl-diphenyl-amine) (poly-TPD), owing to the balanced carrier injection and suppressed exciton quenching. Moreover, because of the Joule heating control provided by the novel crosslinked hole transport material, the LED utilising crosslinked poly-FBV has a 150-fold longer operating lifetime (490 min) than that utilizing poly-TPD (3.3 min). The study opens a new avenue for the use of PNC LEDs in commercial semiconductor optoelectronic devices.

Publication status:: Published

Peer review status:: Peer reviewed

Actions

Email

Email this record

Send the bibliographic details of this record to your email address.

Your Email
Please enter the email address that the record information will be sent to.

-
Your message (optional)
Please add any additional information to be included within the email.
Cite

Cite this record

APA Style

Shen, X., Kwak, S. L., Jeong, W. H., Jang, J. W., Yu, Z., Ahn, H., Park, H. J., Choi, H., Park, S. H., Snaith, H. J., Hwang, D.-H., & Lee, B. R. (2023). Thermal management enables stable perovskite nanocrystal light-emitting diodes with novel hole transport material. Small, 19(45).

MLA Style

Shen, X., et al. “Thermal Management Enables Stable Perovskite Nanocrystal Light-Emitting Diodes with Novel Hole Transport Material.” Small, vol. 19, no. 45, Wiley, 2023.

Chicago Style

Shen, X, SL Kwak, WH Jeong, JW Jang, Z Yu, H Ahn, HJ Park, et al. 2023. “Thermal Management Enables Stable Perovskite Nanocrystal Light-Emitting Diodes with Novel Hole Transport Material.” Small 19 (45).
Share
Print